Potential answers for "Machinery sound"
|     | WHIRR | 
|     | WHIR | 
|    | HUM | 
|  | OOMPAH | 
|  | SQUAWK | 
|  | TUT | 
|  | OHO | 
|  | AHA | 
|  | PTUI | 
|  | ECHO | 
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Letter after Foxtrot Member of the common people "Jealous" singer Nick